10437( 4) - 11/01/04 11:35 - [ 1] PROPOSAL FOR HUBBLE SPACE TELESCOPE OBSERVATIONS ST ScI Use Only ID: 10437 Version: 4 Check-in Date: 01-Nov-2004 16:34:24 1.Proposal Title: NICMOS Imaging of a Star-Forming Damped System at z=3.4 ------------------------------------------------------------------------------------ 2. Proposal For 3. Cycle 4. Parallel Pointing Tolerance GO 13 ------------------------------------------------------------------------------------ 5. Investigators Contact? PI: Dr. Andrew J. Bunker University of Exeter CoI: Dr. Stephen J. Warren Imperial College of Science Technology and N Medicine CoI: Dr. Palle Moller European Southern Observatory - Germany N CoI: Ms. Joanna Smith University of Cambridge N CoI: Mr. Stephen Weatherley Imperial College of Science Technology and N Medicine ------------------------------------------------------------------------------------ 6. Abstract This proposal is to complete our program to identify the galaxies responsible for the damped Lyman-alpha absorption systems (DLAs) at high redshift. By combining both STIS (GO-8172, Moller et al. 2002) and NICMOS (GO-7824, Warren et al. 2001) imaging with ground-based spectroscopy, we have been able to develop a picture which unifies DLA galaxies and Lyman-break galaxies (Moller et al. 2002). However, the NICMOS observations failed (due to guide star problems) for a key target - the three z>3 DLAs along the sightline of QSO PC0953+4749. Of all the NICMOS targets in our DLA program, PC0953+4749 is potentially the best, because it is the faintest quasar, allowing us to probe the smallest impact parameters. Our Keck spectroscopy has revealed Lyman-alpha emission from the z=3.4 DLA (Bunker et al. 2004) - the highest- redshift example yet found. We also have a tentative detection of H-beta for this system from UKIRT near-IR spectroscopy. NICMOS observations will enable us to quantify the effects of dust and will provide the all-important sizes and morphologies in the rest-frame optical down to H=26 at 5sigma. HST resolution is essential because the Lyman-alpha emission source at z=3.4 has an impact parameter of only 0.4" ------------------------------------------------------------------------------------ 10437( 4) - 11/01/04 11:35 - [ 2] Observations Description ------------------------ It is important to pay close attention to guide star acquisition: this failed for this target in the NIC2 imaging in GO-7824, but worked in the WFPC2 imaging in GO-6582. Our strategy is to image with NIC2 and the F160W `H-band' filter - exactly the procedure we followed for the rest of this program, GO-7824 (described in Warren et al. 2001). As with the rest of this program, we will use NIC2. For PC0953+4749 we propose to integrate for four orbits to reach H=26 at S/N>5, with each orbit split into two exposures to provide 8 dithered pointings in all - we use the spiral-dither NICMOS pattern with stepsize=2arcsec. We will use WFPC2 and ACS in parallel with our primary NICMOS observations to survey adjacent regions for B-drop z~4 galaxies, potentially tracing large-scale structure associated with the z=3.9 and z=4.25 DLAs or the z=4.5 QSO. Five half-orbits will be in the B-band filter, and three half-orbits in the R-band. Real Time Justification ----------------------- Calibration Justification ------------------------- Additional Comments ------------------- ------------------------------------------------------------------------------------ 10437( 4) - 11/01/04 11:35 - [ 3] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 PC0953+4749 GALAXY, HIGH REDSHIFT RA=09H56M25.3000S +/- 0.1", J2000 R(Vega)=19.73 I(Vega)=19.02 H(AB)=19 GALAXY, PROTOGALAXY DEC=+47D34'42.50" +/- 0.1", (QSO) PLATE-ID=00T8 Coordinate Source: HST_IMAGE 2 PC0953+4749D GALAXY, HIGH REDSHIFT RA=09H56M25.7150S +/- 0.1", J2000 R(Vega)=19.73 I(Vega)=19.02 H(AB)=19 LA GALAXY, PROTOGALAXY DEC=+47D34'52.90" +/- 0.1", (QSO) PLATE-ID=00T8 Coordinate Source: HST_IMAGE Comments: This second pointing is the DLA counterpart, about 10arcsec from the QSO: the pointings overlap, with the QSO in both - the 10arcsec offset will provide good sky subtraction too. This is specified as a different pointing instead of a "pattern" or "PosTarg" to make sure the offset is in the correct direction (rather than being at the mercy of the telescope roll angle). 10437( 4) - 11/01/04 11:35 - [ 4] Visit: 01 Visit Priority: Visit Requirements: SCHED 30%; ORIENT 247.0D TO 257.0 D; ORIENT 157.0D TO 167.0 D; ORIENT 67.0D TO 77.0 D; ORIENT 337.0D TO 347.0 D On Hold Comments: Additional Comments: We can perhaps relax the roll angle/visit orient requirements if this proves difficult to schedule - please inform us if so. As there are different filters and exposure times at each pointing, the standard "pattern" wrapper was not appropriate, so we have specified PosTargs - a diamond of 4 half-orbit pointings around two positions, slightly offset by ~10arcsec from each other, covering both the QSO and the DLA counterpart. Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 PC0953+4749 NIC2 MULTIAC NIC2 F160W SAMP-SEQ=SPARS64,NSAMP=25 1 DEF POS TARG 0, 0; PAR 2-4 CUM WITH 1 ------------------------------------------------------------------------------------------------------------------------------------ 2 ANY NIC1 MULTIAC NIC1 F110W NSAMP=25,SAMP-SEQ=SPARS64 1 DEF CUM ------------------------------------------------------------------------------------------------------------------------------------ 3 ANY ACS/WFC ACCUM WFC F606W CR-SPLIT=NO 1 1250 S ------------------------------------------------------------------------------------------------------------------------------------ 4 ANY WFPC2 IMAGE WF3-FIX F702W CR-SPLIT=NO 1 1100 S see below ------------------------------------------------------------------------------------------------------------------------------------ 5 PC0953+4749 NIC2 MULTIAC NIC2 F160W SAMP-SEQ=SPARS64,NSAMP=24 1 DEF POS TARG 0.375, 2.25; PAR CUM 6-8 WITH 5 ------------------------------------------------------------------------------------------------------------------------------------ 6 ANY NIC1 MULTIAC NIC1 F110W NSAMP=24,SAMP-SEQ=SPARS64 1 DEF CUM ------------------------------------------------------------------------------------------------------------------------------------ 7 ANY ACS/WFC ACCUM WFC F606W CR-SPLIT=NO 1 1300 S ------------------------------------------------------------------------------------------------------------------------------------ 8 ANY WFPC2 IMAGE WF3-FIX F702W CR-SPLIT=NO 1 1200 S ------------------------------------------------------------------------------------------------------------------------------------ 9 PC0953+4749 NIC2 MULTIAC NIC2 F160W SAMP-SEQ=SPARS64,NSAMP=25 1 DEF POS TARG 2.25, 1.875; PAR CUM 10-12 WITH 9 ------------------------------------------------------------------------------------------------------------------------------------ 10 ANY NIC1 MULTIAC NIC1 F160W SAMP-SEQ=SPARS64,NSAMP=25 1 DEF CUM ------------------------------------------------------------------------------------------------------------------------------------ 11 ANY ACS/WFC ACCUM WFC F606W CR-SPLIT=NO 1 1350 S ------------------------------------------------------------------------------------------------------------------------------------ 12 ANY WFPC2 IMAGE WF3-FIX F702W CR-SPLIT=NO 1 1100 S ------------------------------------------------------------------------------------------------------------------------------------ 13 PC0953+4749 NIC2 MULTIAC NIC2 F160W SAMP-SEQ=SPARS64,NSAMP=25 1 DEF POS TARG 1.875,-0.375; CUM PAR 14-16 WITH 13 ------------------------------------------------------------------------------------------------------------------------------------ 10437( 4) - 11/01/04 11:35 - [ 5] Exposures ----------------------------------------------------------------------------------------------------------------------------------- Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| | Requirements ----------------------------------------------------------------------------------------------------------------------------------- 14 ANY NIC1 MULTIAC NIC1 F160W SAMP-SEQ=SPARS64,NSAMP=25 1 DEF CUM ------------------------------------------------------------------------------------------------------------------------------------ 15 ANY ACS/WFC ACCUM WFC F435W CR-SPLIT=NO 1 1300 S ------------------------------------------------------------------------------------------------------------------------------------ 16 ANY WFPC2 IMAGE WF3-FIX F439W CR-SPLIT=NO 1 1100 S ------------------------------------------------------------------------------------------------------------------------------------ 17 PC0953+4749 NIC2 MULTIAC NIC2 F160W SAMP-SEQ=SPARS64,NSAMP=25 1 DEF POS TARG 0, 0; PAR 18-20 DLA CUM WITH 17 ------------------------------------------------------------------------------------------------------------------------------------ 18 ANY NIC1 MULTIAC NIC1 F160W SAMP-SEQ=SPARS64,NSAMP=25 1 DEF CUM ------------------------------------------------------------------------------------------------------------------------------------ 19 ANY ACS/WFC ACCUM WFC F435W CR-SPLIT=NO 1 1300 S ------------------------------------------------------------------------------------------------------------------------------------ 20 ANY WFPC2 IMAGE WF3-FIX F439W CR-SPLIT=NO 1 1100 S ------------------------------------------------------------------------------------------------------------------------------------ 21 PC0953+4749 NIC2 MULTIAC NIC2 F160W SAMP-SEQ=SPARS64,NSAMP=24 1 DEF POS TARG 0.15, 0.6; PAR DLA CUM 22-24 WITH 21 ------------------------------------------------------------------------------------------------------------------------------------ 22 ANY NIC1 MULTIAC NIC1 F160W SAMP-SEQ=SPARS64,NSAMP=24 1 DEF CUM ------------------------------------------------------------------------------------------------------------------------------------ 23 ANY ACS/WFC ACCUM WFC F435W CR-SPLIT=NO 1 1250 S ------------------------------------------------------------------------------------------------------------------------------------ 24 ANY WFPC2 IMAGE WF3-FIX F439W CR-SPLIT=NO 1 1100 S ------------------------------------------------------------------------------------------------------------------------------------ 25 PC0953+4749 NIC2 MULTIAC NIC2 F160W SAMP-SEQ=SPARS64,NSAMP=25 1 DEF POS TARG 0.6, 0.45; PAR DLA CUM 26-28 WITH 25 ------------------------------------------------------------------------------------------------------------------------------------ 26 ANY NIC1 MULTIAC NIC1 F110W SAMP-SEQ=SPARS64,NSAMP=25 1 DEF CUM ------------------------------------------------------------------------------------------------------------------------------------ 27 ANY ACS/WFC ACCUM WFC F435W CR-SPLIT=NO 1 1350 S ------------------------------------------------------------------------------------------------------------------------------------ 28 ANY WFPC2 IMAGE WF3-FIX F439W CR-SPLIT=NO 1 1100 S ------------------------------------------------------------------------------------------------------------------------------------ 29 PC0953+4749 NIC2 MULTIAC NIC2 F160W SAMP-SEQ=SPARS64,NSAMP=25 1 DEF POS TARG 0.45,-0.15; PAR DLA CUM 30-32 WITH 29 ------------------------------------------------------------------------------------------------------------------------------------ 30 ANY NIC1 MULTIAC NIC1 F110W SAMP-SEQ=SPARS64,NSAMP=25 1 DEF CUM ------------------------------------------------------------------------------------------------------------------------------------ 31 ANY ACS/WFC ACCUM WFC F435W CR-SPLIT=NO 1 1350 S ------------------------------------------------------------------------------------------------------------------------------------ 32 ANY WFPC2 IMAGE WF3-FIX F439W CR-SPLIT=NO 1 1300 S ------------------------------------------------------------------------------------------------------------------------------------ 10437( 4) - 11/01/04 11:35 - [ 6] Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ PC0953+4749 1 NIC2 MULTIAC NIC2 F160W none none none none 1 N/A CUM ANY 2 NIC1 MULTIAC NIC1 F110W none none none none 1 N/A CUM ANY 3 ACS/WFC ACCUM WFC F606W none none none none 1 N/A ANY 4 WFPC2 IMAGE WF3-FIX F702W none none none none 1 1100.0 S PC0953+4749 5 NIC2 MULTIAC NIC2 F160W none none none none 1 N/A CUM ANY 6 NIC1 MULTIAC NIC1 F110W none none none none 1 N/A CUM ANY 7 ACS/WFC ACCUM WFC F606W none none none none 1 N/A ANY 8 WFPC2 IMAGE WF3-FIX F702W none none none none 1 N/A PC0953+4749 9 NIC2 MULTIAC NIC2 F160W none none none none 2 N/A CUM ANY 10 NIC1 MULTIAC NIC1 F160W none none none none 2 N/A CUM ANY 11 ACS/WFC ACCUM WFC F606W none none none none 2 N/A ANY 12 WFPC2 IMAGE WF3-FIX F702W none none none none 2 N/A PC0953+4749 13 NIC2 MULTIAC NIC2 F160W none none none none 2 N/A CUM ANY 14 NIC1 MULTIAC NIC1 F160W none none none none 2 N/A CUM ANY 15 ACS/WFC ACCUM WFC F435W none none none none 2 N/A ANY 16 WFPC2 IMAGE WF3-FIX F439W none none none none 2 N/A PC0953+4749DLA 17 NIC2 MULTIAC NIC2 F160W none none none none 3 N/A CUM ANY 18 NIC1 MULTIAC NIC1 F160W none none none none 3 N/A CUM ANY 19 ACS/WFC ACCUM WFC F435W none none none none 3 N/A ANY 20 WFPC2 IMAGE WF3-FIX F439W none none none none 3 N/A PC0953+4749DLA 21 NIC2 MULTIAC NIC2 F160W none none none none 3 N/A CUM ANY 22 NIC1 MULTIAC NIC1 F160W none none none none 3 N/A CUM ANY 23 ACS/WFC ACCUM WFC F435W none none none none 3 N/A ANY 24 WFPC2 IMAGE WF3-FIX F439W none none none none 3 N/A PC0953+4749DLA 25 NIC2 MULTIAC NIC2 F160W none none none none 4 N/A CUM ANY 26 NIC1 MULTIAC NIC1 F110W none none none none 4 N/A CUM ANY 27 ACS/WFC ACCUM WFC F435W none none none none 4 N/A ANY 28 WFPC2 IMAGE WF3-FIX F439W none none none none 4 N/A 10437( 4) - 11/01/04 11:35 - [ 7] Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ PC0953+4749DLA 29 NIC2 MULTIAC NIC2 F160W none none none none 4 N/A CUM ANY 30 NIC1 MULTIAC NIC1 F110W none none none none 4 N/A CUM ANY 31 ACS/WFC ACCUM WFC F435W none none none none 4 N/A ANY 32 WFPC2 IMAGE WF3-FIX F439W none none none none 4 N/A 10437( 4) - 11/01/04 11:35 - [ 8] Summary Form for Proposal 10437 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures NIC2 NIC1 WFC WF3-FIX ------------------------------------------------------------------------------------------------------------------------------------ Configurations NIC2 NIC1 ACS/WFC WFPC2 ------------------------------------------------------------------------------------------------------------------------------------ Opmodes MULTIACCUM ACCUM IMAGE ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters SAMP-SEQ=SPARS64 NSAMP=25 CR-SPLIT=NO NSAMP=24 ------------------------------------------------------------------------------------------------------------------------------------ Proposal Category GO ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements SCHED 30%; ORIENT 247.0D TO 257.0 D; ORIENT 157.0D TO 167.0 D; ORIENT 67.0D TO 77.0 D; ORIENT 337.0D TO 347.0 D POS TARG 0, 0; PAR 2-4 WITH 1 POS TARG 0.375, 2.25; PAR 6-8 WITH 5 POS TARG 2.25, 1.875; PAR 10-12 WITH 9 POS TARG 1.875,-0.375; PAR 14-16 WITH 13 POS TARG 0, 0; PAR 18-20 WITH 17 POS TARG 0.15, 0.6; PAR 22-24 WITH 21 POS TARG 0.6, 0.45; PAR 26-28 WITH 25 POS TARG 0.45,-0.15; PAR 30-32 WITH 29 ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F160W F110W F606W F702W F435W F439W ------------------------------------------------------------------------------------------------------------------------------------ Target Names PC0953+4749 ANY PC0953+4749DLA ------------------------------------------------------------------------------------------------------------------------------------